Pipe-wrench



(No ModeL) W. KING.

PIPE WRENCH.

No. 521,267. 1 Patented June 12, 1894.

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UNITED STATES PATENT OFFICE.

WILLIAM KING, OF LONGMONT, COLORADO.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 521,267, dated June 12,1894. Application ined February 12, 1894. serial No. 499,945. N0 man.)

To @ZZ whom it may concern:

Beit known that I, WILLIAM KING, a citizen, of the United States ofAmerica, residing at Longmont,in the county of Boulder and State ofColorado, have invented certain new and useful Improvements inPipe-Wrenches; and Ido declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specification.

My invention relates to improvements in* chain pipe wrenches, and theobjects of my invention are, first, to provide a cheap, durable andeflicient chain pipe wrench; second, to provide a wrench that will vgripthe pipe without slipping when moved to turn it; third, to provide areversible gripping device. I attain these objects by the mechanismillustrated and described in the accompanying drawings andspecification, in which- Figure l represents a front elevation of myimproved chain pipe wrench showing a fragment of the handle. Fig. 2represents a side elevation of the same showing the handle end of thewrench bar, a fragment ot' the handle and the coupling in section. Fig.3 represents a fragmentary view of the gripping end of the wrench insection, through the center of the wrench bar on line A. of Fig. 1. Fig.4. represents a fragmentary perspective View of the end of the wrenchbar. Fig. 5 represents a fragmentary perspective View of the grippingdevice.

Similar letters of reference refer to similar parts throughout theseveral views.

Referring to Fig. 1, B. represents the wrench bar. It is provided withseveral slots C. which are cut into the front edge and are adapted toreceive the clevis D. which lits freely over the bar B. Pivotallyconnectedv with the clevis is a chain E, preferably a iiat chain. Thechain illustrated is well adapted for the purpose, as the outside linksare provided with a flange F. which partially surrounds the rivet headsand protects them. The chain passes through a clip G. which is securedto the end of the wrench bar. Upon the other end of the chain I pivot agripping link H., on the end of which I form a toe I., or upwardlyprojecting end J., which I bevel on the face downward and backward insuch a manner as to prevent the face B2 of the wrench bar head fromslipping off of it by sliding back when under pressure. The wrench baris provided with a head B projecting forward from the body of the bar,which is beveled upward and backward to match the bevel of the face ofthe toe, as shown in Fig. 4. I alsoform lips K. on either side of theprojectinghead Bof the wrench bar, which pass down on each side of thetoe I. and prevent its slipping from under the bar sidewise,consequently it cannot slip away in either direction, as it is held oneway by the lips and the other by the upward and backward bevel of thehead.

On the under side of the gripping link I-I., I secure a hardened steelgrip block L. with a screw M. which passes freely through it into thelink. I make the hole in said block large enough and long enough toallow the block to butt against the shoulder M', which is formed on thelink to receive' it. I make this grip block square so that every edgemay be used until too dull to grip the pipe, which may be done bywithdrawing the screw and turning it around or over. As there are eightedges the block will last a long time, and it can be reground and usedover again several times.

On the handle of the wrench bar I form a threaded plug 0.', and a collarP., which are adapted to receive a coupling Q., into which I screw for ahandle a piece of pipe R. As

the handles are detachable, Various lengthsv of pipe can be used whenworking on different sizes of pipe to secure proper leverage.

Figs. l and 2 represent one half Yfull size y views of a wrench capableof filling from two to eight inch pipe. To grip a pipe S the chain isthrown under and around it, and the wrench bar handle is moved back ordown until the toe will pass by the projecting headB. Then the handle ismoved forwarder upward and the head impinged against the toe, as shownin Fig. 2, thereby locking the two together. The cornerof the block willgrip the pipe, instantly causing the chain to tighten and the pipe toturn ifthe upward movement is continued. On the back or return stroke ofthe IOO handle, the chain and gripping link will slip easily around thepipe without being unhooked.

IfIaving described my invention, what I claim as new, and desire tosecure by Letters Patent, is- 4 l. The combination in a chain pipewrench of a wrench bar provided with a suitable handle; having severalslots in its edge adapted to receive a movable clevis pivoted to a bandchain; and a projecting head, provided with an upwardly and backwardlyinclined face with downwardly extendinglips on each side, with aterminal link of said chain, having a downwardly and backwardly inclinedface adapted to impinge against the inclined face of said head betweensaid lips, as herein specified.

2. The combination in a chain wrench; of a handle and a couplingthreaded to the end of said handle, of a wrench bar having a collar anda threaded hub at one end detachably connected to said coupling; of aprojecting head provided with lips on the opposite end of said baradapted to impinge against and partially inclose a projecting end on achain band link and the lips of said projecting head to pass over anddown on each side of it, and a series of slots in said bar adapted toreceive a clevis pivoted to a chain; of a clip secured near the end ofsaid bar freely surrounding said chain, as herein specied.

3. The combination in a chain wrench; a Wrench bar having a collar andthreaded hub, a coupling fitting said hub and a pipe handle fitting saidcoupling, a series of slots in said bar, a projecting head provided witha backward and upward bevel on its under side and having the sides ofsaid head projecting below the central portion, thereby forming lips, aclevis pivoted to a chain and fitting said slots, a link secured to theend of the chain with an upward projecting end or toe, and having adownward and backward bevel arranged to contact with said projectinghead, of said wrench bar, of a hardened square reversible gripping blocksecured to the said gripping link, and arranged to impinge with itsreversible edges against the pipe, as herein specified.

4:. In a chain wrench; a chain or gripping band E. having a grippinglink I-I. with au upwardly projecting end I. beveled to contact with theconnecting end of awrench bar or wrench handle and having a squarehardened steel block L.,detachably and reversibly secured to its underside and arranged to impinge with: its edges against said pipe, andhaving a recess in said link for the reception of said block, adapted toreceive the body of the block to prevent its gripping edge extending toofar above the binding surface of the chain, as herein specified.

In testimony whereof I aliix my signature in presence of two witnesses.

WILLIAM KING.

Witnesses:

LEO O. SCOTT, J oHN EMoaY MEEK.

